Dental cup.



PATENTED MAY 16, 1905.

No. 789.908- v W. HARE.

DENTAL CUP.

APPLICATION FILED SEPT. 17, 1904- J l W sawanl'oz wifweaowo Z aflozum g,

WILLIAM HARE, OF AUGUSTA, ILLINOIS, ASSIGNOR TO DR. HARES DEN- PatentedMay 16, 1905.

PATENT OFFICE.

TAL DEVICE (10., OF DANVILLE, ILLINOIS, A CORPORATION.

DENTAL CUP- SPEGIFIGATION forming part of Letters Patent No. 789,908,dated May 16, 1905.

Application filed September 17, 1904. Serial No. 224,802.

T0 on whom, it nuty concern.-

Be it known that I, WILLIAM HARE, acitizen of the United States ofAmerica, residing at Augusta, in the county of Hancock and State ofIllinois, have invented certain new and useful Improvements in DentalCups, of which the following is a specification.

This invention relates to dentistry, but more particularly to thatclass. known as molds thereunder.

The object of the invention is to provide novel means in combinationwith a dental cup whereby an impression of the lower jaw can be moreeffectually taken.

It also has for an object the provision of a device of this characterwherein a plurality of movable Wings are carried by a wall of the cupand said wings being supplied by means within easy access of theoperator in order that the impression may be taken with expedition bythe operator and with less annoyance or inconvenienceto the patient.

An additional object of the invention is to provide an improved methodof attaching the compression-wings.

A further object of the invention is to provide means for operating thewings whereby the movement of the plastic material employed in takingthe impression is limited or confined, a feature which is found of greatadvantage in practice.

Further, the object of the invention is to produce a device of thischaracter that is simple in construction, eflicient in practice, andeconomical to manufacture.

With the above and other objects in view the invention consists in thedetails of construction and in the arrangement and combination of partsto be hereinafter more fully described and claimed.

In describing the invention in detail reference will be had to theaccompanying drawings, forming part of this specification, wherein' likecharacters of reference denote corresponding parts in the several views,and in which Figure 1 is a perspective view of the device.

Fig. 2 is a view, partly in section and partly in elevation, showing theinvention in detail;

and Fig. 3 is a perspective view of one of the wings, said wing beingshown detached.

In the drawings, A indicates the impression-cup, and B the handletherefor, connected thereto in any preferred or ordinary construction.The inner wall a of the cup is provided near each end with a series ofapertures 1, adapted to receive the rounded lugs or projections 2,extending from an edge of the wing or plate 3' and formed integraltherewith. The apertures 1 are formed near the base 7) of the cup, andthe Wings 3 are so shaped as to conform approximately to the contour ofthe inner wall a of the cup. The engagement between the lugs 2 and'theWall a is such as to provide a pivot for the wing 3, which is therebyfree to swing laterally. In a complete device there are two wingsemployed in the preferred construction, said wings being oppositelydisposed; but of course any number of wings may be employed to meet anynecessities that may arise. Secured in any suitable way to the freeportion of each of the wings 3 is a lever 4: for operating the same. Thesaid lever is provided at one end with the angular portion 5, which isadapted to bridge the edge of the wall a, and the stem 6 of the leverextends from the wall, preferably at an angle, to a suitable length, inorder that it may be easily reached by the operator. When two wings areemployed, it is the intention of the invention to have the levers 5 orthe stem 6 thereof to converge, in order that an impression may be takenon both sides of the cup simultaneously. By having the levers connectedto the free end portion of plates or wings the spreading of the plasticmaterial employed is confined. As the pressure is exerted on the edge ofthe wings the mass is forced toward the base 6, and is thereby mosteffectually confined and a much more satisfactory impression taken. Thelever 5 may be connected to the wing or plate 3 by soldering or anyother preferred means, and in practice it has been found advantageous tohave a portion 7 of the angular end 5 to extend down a portion of theinner face of the wing.

From the foregoing description the operation and construction of theabove invention, it is thought, will be full y understood by thoseskilled in the art, it being noted that all changes may be resorted tothat fairly fall within the scope of the claims hereunto attachedwithout sacrificing the value or spirit thereof.

Having thus fully described my invention, What I claim as new, anddesire to secure by Letters Patent, is

1. In combination with a dental cup, a plurality of wings within the cupand pivoted to a wall thereof, and means secured to the wings andbridging the wall for imparting amovement to said wings.

2. In combination with a dental cup having ing pivotally connected atone edge to a wall thereof and means secured at the opposite portion ofthe wings and bridging the wall for imparting a movement to the saidwings.

In testimony whereof I affix my signature,

in the presence of two witnesses, this 15th day of September, 1904.

WILLIAM HARE.

Witnesses:

JAooB KLEPPER, S. E. MCAFEE.

